Both are bls that focus on a "master/servant" relationship that turns romantic. IL was the first thing I thought of when I first watched WYEL.
Although definitively different shows, there is a slice of life feel to both (much more present in HP). Primarily, the scenes in WTWIF that focus on the village and its people reminded me of the scenes in HP where we see the doctors and patients in the hospital interacting with each other in a way that isn't fully "necessary" to the overall plot. Both shows have a very calming effect while still dealing with heavy topics.
Both are romantic healing dramas that feature a City Girl moving to the countryside and falling in love with a boy there. Both couples have good chemistry, and the ML has feelings from the start but doesn't immediately show them outright to the FL due to his trauma. Both follow multiple storylines of the villagers alongside the main protagonists. Both have a very similar heartwarming vibe.